Built in 1588 by Geraldus Wall and his wife Catherine Commerford, as recorded on a datestone that was relocated to nearby Coolnamuck House during the 19th century, this fortification represents the defensive architecture typical of Ireland’s turbulent early modern period. The castle remained in Wall family ownership through at least 1640, when records show James Wall as the proprietor.

The rectangular tower house rises three storeys high, measuring approximately 12 metres north to south and 9 metres east to west, though today only its southern wall remains at full height. The structure incorporates defensive features characteristic of its era, including a vaulted loft beneath the first floor containing a window flanked by musket loops, and an attic level above the second floor with evidence of a robbed fireplace. The upper levels reveal sophisticated defensive planning, with guardrooms built into the wall-walks at both east and west corners, whilst the southeast angle features a machicolation; an overhanging opening through which defenders could drop projectiles on attackers below. Much of the ground floor now lies buried beneath accumulated rubble, obscuring the original entrance.

Surrounding the tower house, a substantial square bawn wall once enclosed a defensive courtyard measuring 54 metres on each side, though the northern section has since disappeared. Two circular flanking towers strengthened the bawn’s corners; whilst the northeastern tower survives only as foundations, its northwestern counterpart still stands two storeys tall. This surviving tower, accessed through a pointed doorway, contains multiple musket loops on both levels, though curiously lacks any visible stairs between floors. The bawn walls vary dramatically in height, from just half a metre on the southern side to an imposing four metres along the eastern edge, where a natural ravine provided additional defence. Just outside the southeastern corner, Toberavalla Well, now converted to a pumphouse, once served as the castle’s water source.